A charging method for an unmanned aerial vehicle onboard charger and an unmanned aerial vehicle onboard charger

Abstract

The present invention discloses a charging method of an unmanned aerial vehicle onboard charger and an unmanned aerial vehicle onboard charger, the charging method comprising: collecting temperature data; the temperature data comprises the ambient temperature or the device temperature when the unmanned aerial vehicle onboard charger is charging; when the ambient temperature or the device temperature is less than a first preset temperature, adjusting the charging current according to the temperature data so that the current value of the charging current is less than the preset value; when the operation data of the unmanned aerial vehicle onboard charger meets the preset conditions, outputting the charging current. The charging current is adjusted according to the temperature data so that the current value of the charging current is less than the preset value, and when the operation data of the unmanned aerial vehicle onboard charger meets the preset conditions, the charging current with a current value less than the preset value is output, so that the present invention can flexibly adjust the charging current at different temperatures according to the collected temperature data, and output a smaller charging current for charging when the ambient temperature or the device temperature is low, thereby realizing the charging of the unmanned aerial vehicle onboard charger in a low temperature environment.

Description

Technical Field

[0001] The present invention relates to the field of design of unmanned aerial vehicle (UAV) onboard chargers, and in particular to a charging method of an unmanned aerial vehicle (UAV) onboard charger and an unmanned aerial vehicle (UAV) onboard charger. Background Art

[0002] With the development of artificial intelligence in society, unmanned operations are becoming more and more popular, and the understanding of power storage is becoming deeper and deeper. In unmanned systems, more attention is paid to the charging and discharging design of power supplies. In addition to the engine power supply, drones are also powered by energy storage battery systems when they are running.

[0003] Many power designers generally design the charging and discharging temperature of drone chargers to 0℃~45℃, which cannot meet the requirements of drones used in high altitude or extremely low temperature environments such as -40℃. Low temperature environments will reduce charging efficiency and even make drones unable to charge, thus affecting the operation capability of drones and greatly limiting the application scenarios of drones. To meet the needs of drones charging at high altitudes, printed circuit board heating is required, but this usually requires power supply to achieve semiconductor heating or heating resistor wire heating, which increases energy consumption and product weight while reducing product efficiency.

[0004] Therefore, a new design of drone onboard charger is currently being developed that can avoid the problem that traditional chargers cannot charge in low temperature environments. Summary of the invention

[0005] The present invention provides a charging method for an unmanned aerial vehicle onboard charger and an unmanned aerial vehicle onboard charger to solve the above-mentioned technical problems, and can realize charging of the unmanned aerial vehicle onboard charger in a low temperature environment.

[0006] In a first aspect, in order to solve the above technical problems, the present invention provides a charging method for an unmanned aerial vehicle onboard charger, comprising:

[0007] Collect temperature data; the temperature data includes ambient temperature or device temperature when the drone onboard charger is charging;

[0008] When the ambient temperature or the device temperature is lower than the first preset temperature, adjusting the charging current according to the temperature data so that the current value of the charging current is lower than the preset value;

[0009] When the operating data of the drone onboard charger meets the preset conditions, the charging current is output.

[0010] The beneficial effects of the present invention are:

[0011] The present invention collects temperature data, and when the ambient temperature or the device temperature is lower than a first preset temperature, adjusts the charging current according to the temperature data so that the current value of the charging current is lower than a preset value, and when the operating data of the unmanned aerial vehicle onboard charger meets the preset conditions, outputs a charging current with a current value lower than the preset value. Therefore, the present invention can flexibly adjust the charging current at different temperatures according to the collected temperature data, and output a smaller charging current for charging when the ambient temperature or the device temperature is lower, thereby enabling the unmanned aerial vehicle onboard charger to charge in a low temperature environment.

[0012] As a preferred solution, the charging method of the unmanned aerial vehicle onboard charger further includes:

[0013] When the ambient temperature or the device temperature is greater than a second preset temperature, the charging current is adjusted according to the temperature data so that the current value of the charging current is greater than a preset value; the temperature value of the second preset temperature is greater than the temperature value of the first preset temperature.

[0014] In this preferred solution, when the ambient temperature or the device temperature is greater than the second preset temperature, the charging current is adjusted according to the temperature data so that the current value of the charging current is greater than the preset value. Therefore, this preferred solution can adjust the charging current as the ambient temperature changes or the device temperature changes during the charging process, and output charging currents with different current values ​​at different temperatures.

[0015] In a second aspect, in order to solve the above technical problems, the present invention also provides an unmanned aerial vehicle onboard charger, comprising: a power supply module, a temperature acquisition module, a main control module and a charging module;

[0016] The power supply module is used to supply power to the charging module;

[0017] The temperature acquisition module is used to collect temperature data; the temperature data includes the ambient temperature or the device temperature when the unmanned aerial vehicle onboard charger is charging;

[0018] The main control module is used to output a charging current adjustment instruction according to the temperature data;

[0019] The charging module is used to adjust the charging current according to the charging current adjustment instruction, and output the charging current when the operating data of the unmanned aerial vehicle onboard charger meets the preset conditions;

[0020] When used, the drone onboard charger performs the following operations:

[0021] When the main control module determines that the ambient temperature or the device temperature is lower than the first preset temperature, it outputs a charging current adjustment instruction; the charging module adjusts the charging current according to the charging current adjustment instruction so that the current value of the charging current is lower than the preset value; when the operating data of the unmanned aerial vehicle onboard charger meets the preset conditions, the charging current is output.

[0022] The beneficial effects of the present invention are:

[0023] The present invention forms an unmanned aerial vehicle onboard charger through a charging module and a main control module. When the main control module determines that the ambient temperature or the device temperature is lower than a first preset temperature, the charging current reduction instruction is outputted, so that the charging module determines the charging current according to the charging current reduction instruction, and outputs a smaller charging current based on the power supply module when the operating data of the unmanned aerial vehicle onboard charger meets the preset conditions. The present invention can flexibly adjust the charging current at different temperatures through the main control module and the charging module, and output a smaller charging current for charging when the ambient temperature or the device temperature is lower, thereby realizing charging of the unmanned aerial vehicle onboard charger in a low temperature environment.

[0024] As a preferred solution, the charging module includes: an anti-backflow circuit, a charging management chip, a first resistor, a second resistor, a third resistor, a fourth resistor, a fifth resistor, a sixth resistor, a seventh resistor, an eighth resistor, a ninth resistor, a tenth resistor, an eleventh resistor, a twelfth resistor, a fourteenth resistor, a fifteenth resistor, a sixteenth resistor, a seventeenth resistor, a nineteenth resistor, a twenty-third resistor, a twenty-fourth resistor, a twenty-fifth resistor, a twenty-ninth resistor, a thirtieth resistor, a thirty-second resistor, a thirty-fourth resistor, a thirty-fifth resistor, a thirty-sixth resistor, a thirty-eighth resistor, a fortieth resistor, a first capacitor, a sixth capacitor, an eighth capacitor, a ninth capacitor, a thirteenth capacitor, a fourteenth capacitor, a sixteenth capacitor, an eighteenth capacitor, a nineteenth capacitor, a twenty-third capacitor, a twenty-fifth capacitor, a twenty-sixth capacitor, a twenty-seventh capacitor, a twenty-eighth capacitor, a twenty-ninth capacitor, a thirtieth capacitor, a thirty-sixth capacitor, a thirty-seventh capacitor, a first MOS tube, a second MOS tube, a fourth MOS tube, a fifth MOS tube, a first inductor and a thermistor;

[0025] The input end of the anti-backflow circuit serves as the input end of the charging module;

[0026] The second end of the first resistor, the second end of the second resistor, the first end of the fifth resistor, the first end of the sixth capacitor, the first end of the third resistor and the first end of the eighth capacitor serve as output ends of the charging module to output a charging current;

[0027] The output end of the anti-backflow circuit is electrically connected to the first end of the fourth resistor and the first end of the sixteenth resistor;

[0028] The seventh resistor is connected in parallel with the fourth resistor;

[0029] The second end of the sixteenth resistor is electrically connected to the first end of the twenty-seventh capacitor and the first end of the twenty-eighth capacitor;

[0030] The second end of the fourth resistor is electrically connected to the first end of the fifteenth resistor, the first end of the sixteenth capacitor, the first end of the fourteenth capacitor, the first end of the twelfth resistor, the thirty-third pin of the charging management chip, the thirty-second pin of the charging management chip, the first end of the first capacitor and the drain of the first MOS tube;

[0031] The second end of the fifteenth resistor is electrically connected to the second end of the twenty-seventh capacitor, the first end of the twenty-ninth capacitor and the twenty-ninth pin of the charging management chip;

[0032] The second end of the ninth capacitor is electrically connected to the twenty-third pin of the charging management chip;

[0033] The second end of the twelfth resistor is electrically connected to the thirty-fourth pin of the charging management chip and the first end of the seventeenth resistor;

[0034] The second end of the seventeenth resistor is electrically connected to the first end of the nineteenth resistor, the first end of the thirtieth capacitor and the thirty-fifth pin of the charging management chip;

[0035] The twenty-fourth pin of the charging management chip is electrically connected to the first end of the twenty-sixth capacitor and the first end of the twenty-third resistor;

[0036] The second end of the twenty-third resistor is electrically connected to the first end of the thirty-fifth resistor, the first end of the thermistor and the eighth pin of the charging management chip;

[0037] The thirty-sixth pin of the charging management chip is electrically connected to the first end of the thirty-second resistor;

[0038] The ninth pin of the charging management chip is electrically connected to the first end of the thirty-fourth resistor and the first end of the thirty-eighth resistor;

[0039] The second end of the thirty-fourth resistor is electrically connected to the first end of the thirty-sixth capacitor;

[0040] The tenth pin of the charging management chip is electrically connected to the first end of the thirty-sixth resistor and the first end of the fortieth resistor;

[0041] The second end of the thirty-sixth resistor is electrically connected to the first end of the thirty-seventh capacitor;

[0042] The twenty-seventh pin of the charging management chip is electrically connected to the gate of the first MOS tube and the first end of the eleventh resistor through the ninth resistor;

[0043] The source of the first MOS tube is electrically connected to the second end of the eleventh resistor, the first end of the first inductor, the drain of the fifth MOS tube and the twenty-eighth pin of the charging management chip;

[0044] The gate of the fifth MOS tube is electrically connected to the twenty-fifth pin of the charging management chip through the twenty-fourth resistor; the gate of the fifth MOS tube is electrically connected to the first end of the twenty-ninth resistor;

[0045] The nineteenth pin of the charging management chip is electrically connected to the first end of the tenth resistor and the gate of the second MOS tube through the eighth resistor;

[0046] The second end of the tenth resistor is electrically connected to the source of the second MOS tube, the second end of the first inductor, the drain of the fourth MOS tube and the eighteenth pin of the charging management chip;

[0047] The twenty-first pin of the charging management chip is electrically connected to the first end of the thirtieth resistor and the gate of the fourth MOS tube through the twenty-fifth resistor;

[0048] The drain of the second MOS tube is electrically connected to the first end of the first resistor, the first end of the second resistor and the first end of the sixth resistor;

[0049] The second end of the sixth resistor is electrically connected to the first end of the thirteenth capacitor, the first end of the eighteenth capacitor and the fourteenth pin of the charging management chip;

[0050] The second end of the fifth resistor is electrically connected to the second end of the thirteenth capacitor, the first end of the nineteenth resistor and the thirteenth pin of the charging management chip;

[0051] The twelfth pin of the charging management chip is electrically connected to the second end of the third resistor, the second end of the eighth capacitor and the first end of the fourteenth resistor;

[0052] The second end of the fourteenth resistor is electrically connected to the eleventh pin of the charging management chip;

[0053] The second end of the twenty-eighth capacitor, the second end of the twenty-ninth capacitor, the second end of the sixteenth capacitor, the second end of the fourteenth capacitor, the second end of the nineteenth resistor, the second end of the thirtieth capacitor, the first end of the ninth capacitor, the second end of the twenty-sixth capacitor, the second end of the thirty-fifth resistor, the second end of the thermistor, the second end of the first capacitor, the second end of the thirty-second resistor, the second end of the thirty-sixth capacitor, the second end of the thirty-eighth resistor, the second end of the thirty-seventh capacitor, the second end of the fortieth resistor, the second end of the twenty-ninth resistor, the source of the fifth MOS tube, the second end of the thirtieth resistor, the source of the fourth MOS tube, the second end of the eighteenth capacitor, the second end of the nineteenth capacitor, the second end of the sixth capacitor, the seventeenth pin of the charging management chip U1, the twenty-second pin of the charging management chip U1 and the thirty-seventh pin of the charging management chip U1 are grounded.

[0054] The preferred solution forms a charging module through a charging management chip and several electronic components, so that the charging module adjusts the charging current according to the charging current adjustment instruction, and outputs the charging current when the operating data of the unmanned aerial vehicle onboard charger meets the preset conditions.

[0055] As a preferred solution, the anti-backflow circuit is used to prevent the voltage of the rear-stage circuit from backflowing to the front-stage circuit; the anti-backflow circuit includes an N+1 redundant chip, a fourth capacitor, a fifth capacitor, a twentieth capacitor, a twenty-first capacitor, a twenty-second capacitor, a twenty-fourth capacitor and a third MOS tube;

[0056] The first end of the twentieth capacitor, the first end of the twenty-first capacitor, the ANODE pin of the N+1 redundant chip, the EN pin of the N+1 redundant chip and the drain of the third MOS tube serve as the input end of the anti-backflow circuit;

[0057] The source of the third MOS tube, the second end of the fourth capacitor, the second end of the fifth capacitor, the first end of the twenty-second capacitor, the first end of the twenty-fourth capacitor and the CATHODE pin of the N+1 redundant chip serve as the output end of the anti-backflow circuit;

[0058] A second end of the twenty-first capacitor is electrically connected to a VCAP pin of the N+1 redundant chip;

[0059] The gate of the third MOS tube is electrically connected to the GATE pin of the N+1 redundant chip;

[0060] The second end of the twentieth capacitor, the GND pin of the N+1 redundant chip, the first end of the fourth capacitor, the first end of the fifth capacitor, the second end of the twenty-second capacitor and the second end of the twenty-fourth capacitor are grounded.

[0061] This preferred solution forms an anti-backflow circuit through N+1 redundant chips, a number of capacitors and MOS tubes, which can prevent the voltage of the subsequent circuit from backflowing to the previous circuit.

[0062] As a preferred solution, the unmanned aerial vehicle onboard charger further includes: a power supply processing module; the input end of the power supply processing module is electrically connected to the power supply module; the output end of the power supply processing module is electrically connected to the charging module; the power supply processing module includes an anti-reverse connection protection circuit, a surge suppression circuit, an electromagnetic compatibility circuit and a DC-DC conversion circuit;

[0063] Wherein, the positive input end of the anti-reverse connection protection circuit is used as the positive input end of the power supply processing module; the negative input end of the anti-reverse connection protection circuit is used as the negative input end of the power supply processing module;

[0064] The output end of the DC-DC conversion circuit serves as the output end of the power supply processing module;

[0065] The positive output end of the anti-reverse connection protection circuit is electrically connected to the positive input end of the surge suppression circuit; the negative output end of the anti-reverse connection protection circuit is electrically connected to the negative input end of the surge suppression circuit; the positive output end of the surge suppression circuit is electrically connected to the positive input end of the electromagnetic compatibility circuit; the negative output end of the surge suppression circuit is electrically connected to the negative input end of the electromagnetic compatibility circuit; the positive output end of the electromagnetic compatibility circuit is electrically connected to the positive input end of the DC-DC conversion circuit; the negative output end of the electromagnetic compatibility circuit is electrically connected to the negative input end of the DC-DC conversion circuit;

[0066] The anti-reverse connection protection circuit is used to protect the drone onboard charger from reverse connection;

[0067] The surge suppression circuit is used to limit the surge current at the moment of power-on;

[0068] The electromagnetic compatibility circuit is used to suppress electromagnetic interference;

[0069] The DC-DC conversion circuit is used to perform voltage conversion on the power supply module, and output power supply to supply power to the charging module.

[0070] This preferred solution consists of a power supply processing module through an anti-reverse connection protection circuit, a surge suppression circuit, an electromagnetic compatibility circuit and a DC-DC conversion circuit. Among them, the anti-reverse connection protection circuit can prevent customers from operating incorrectly and improve the safety of using the drone onboard charger. The surge suppression circuit can limit the current at the moment of startup to prevent the power supply module from being pulled down, thereby improving the stability of the drone onboard charger. The electromagnetic compatibility circuit can ensure the operation of the drone onboard charger while isolating the drone onboard charger and other equipment in the drone system. Through the power supply processing module, the safety and stability of the drone onboard charger can be improved.

[0071] As a preferred solution, the main control module is also used to receive the operating data of the unmanned aerial vehicle onboard charger and output a control signal based on the operating data; the control signal is used to control the output of the charging current; the operating data includes the charging module output voltage data, temperature data and the power supply module output voltage data; the main control module is also used to output a low-voltage power supply.

[0072] This preferred solution can output a control signal according to the operating data of the drone onboard charger, thereby controlling the output of the charging current and realizing the operation monitoring of the drone onboard charger itself.

[0073] As a preferred solution, the anti-reverse connection protection circuit includes: a first fuse, an eighty-first resistor, an eighty-third resistor, an eighty-seventh resistor, a fourth voltage stabilizing diode and a twelfth MOS tube;

[0074] The first end of the first fuse serves as a positive input end of the anti-reverse connection protection circuit;

[0075] The drain of the twelfth MOS tube serves as the negative input terminal of the anti-reverse connection protection circuit;

[0076] The second end of the first fuse and the first end of the eighty-first resistor serve as the positive output end of the anti-reverse connection protection circuit;

[0077] The second end of the eighty-seventh resistor, the anode of the fourth voltage-stabilizing diode and the source of the twelfth MOS transistor serve as the negative output end of the reverse connection protection circuit;

[0078] The second end of the eighty-first resistor is electrically connected to the first end of the eighty-third resistor;

[0079] The second end of the eighty-third resistor is electrically connected to the gate of the twelfth MOS tube, the first end of the eighty-seventh resistor and the cathode of the fourth voltage-stabilizing diode.

[0080] This preferred solution forms an anti-reverse connection protection circuit through a fuse, several resistors, a voltage-stabilizing diode and a MOS tube, which can prevent customers from operating incorrectly and improve the safety of using the drone onboard charger.

[0081] As a preferred solution, the surge suppression circuit includes: an eighty-second resistor, an eighty-fourth resistor, an eighty-fifth resistor, an eighty-sixth resistor, an eighty-eighth resistor, a ninety-first resistor, a ninety-third resistor, a ninety-fourth resistor, a seventy-fourth capacitor, a seventy-seventh capacitor, a seventy-eighth capacitor, a third voltage stabilizing diode, a tenth transistor and an eleventh MOS transistor;

[0082] The first end of the eighty-second resistor and the first end of the seventy-fourth capacitor serve as a positive input terminal and a positive output terminal of the surge suppression circuit;

[0083] The second end of the eighty-eighth resistor, the anode of the third voltage zener diode, the collector of the tenth transistor, the second end of the seventy-seventh capacitor, the second end of the seventy-eighth capacitor, the first end of the ninety-first resistor, the first end of the ninety-fourth resistor and the source of the eleventh MOS transistor serve as the negative input end of the surge suppression circuit;

[0084] The drain of the eleventh MOS tube, the second end of the ninetieth resistor, the second end of the ninety-third resistor and the second end of the seventy-fourth capacitor serve as the negative output end of the surge suppression circuit;

[0085] The second end of the eighty-second resistor is electrically connected to the first end of the eighty-fourth resistor;

[0086] The second end of the eighty-fourth resistor is electrically connected to the first end of the eighty-eighth resistor, the cathode of the third voltage-stabilizing diode, the base of the tenth transistor, and the first end of the eighty-fifth resistor;

[0087] The emitter of the thirteenth transistor is electrically connected to the first end of the eighty-sixth resistor;

[0088] The second end of the eighty-sixth resistor is electrically connected to the second end of the eighty-fifth resistor, the first end of the seventy-seventh capacitor, the first end of the seventy-eighth capacitor and the source of the eleventh MOS tube.

[0089] This preferred solution forms a surge suppression circuit through a number of resistors, a number of capacitors, a voltage-stabilizing diode, a transistor and a MOS tube, which can limit the current at the moment of startup, prevent the power supply module from being pulled down, and improve the stability of the drone onboard charger.

[0090] As a preferred solution, the electromagnetic compatibility circuit includes: a sixty-seventh capacitor, a sixty-ninth capacitor, a seventy-first capacitor, a seventy-second capacitor, a seventy-third capacitor, a seventy-fourth capacitor, a seventy-fifth capacitor, a second common-mode inductor and a third common-mode inductor;

[0091] The first end of the seventy-fourth capacitor, the first end of the seventy-second capacitor and the third end of the second common mode inductor serve as the positive input end of the electromagnetic compatibility circuit;

[0092] The second end of the seventy-fourth capacitor, the second end of the seventy-second capacitor and the second end of the second common mode inductor serve as a negative input end of the electromagnetic compatibility circuit;

[0093] The fourth end of the third common mode inductor, the first end of the sixty-seventh capacitor, the first end of the seventy-first capacitor and the first end of the seventy-third capacitor serve as the positive output end of the electromagnetic compatibility circuit;

[0094] The first end of the third common mode inductor, the second end of the seventy-fifth capacitor, the second end of the seventy-first capacitor and the second end of the seventy-third capacitor serve as a negative output end of the electromagnetic compatibility circuit;

[0095] The fourth end of the second common mode inductor is electrically connected to the first end of the sixty-ninth capacitor, the first end of the seventieth capacitor and the third end of the third common mode inductor;

[0096] The first end of the second common mode inductor is electrically connected to the second end of the sixty-ninth capacitor, the second end of the seventieth capacitor and the second end of the third common mode inductor;

[0097] The second end of the sixty-seventh capacitor and the first end of the seventy-fifth capacitor are connected to the ground line.

[0098] This preferred solution forms an electromagnetic compatibility circuit through a number of capacitors and common-mode inductors, which can ensure the operation of the drone onboard charger while isolating the drone onboard charger box and other equipment in the drone system.

[0099] As a preferred solution, the unmanned aerial vehicle onboard charger further includes: a DC-DC control module for responding to a level control signal output by the main control module when the output voltage of the power supply module is overvoltage or abnormal, and outputting a stop control signal; the DC-DC control module includes: a 100th resistor, a 104th resistor, a 105th resistor, a 106th resistor, an 83rd capacitor, a 14th MOS tube and a first coupler;

[0100] The first end of the one hundred and fifth resistor is used to receive a level control signal;

[0101] The fourth end of the first coupler is used to output a stop control signal;

[0102] The second end of the one hundred and fifth resistor is electrically connected to the first end of the one hundred and sixth resistor;

[0103] The second end of the one hundred and sixth resistor is electrically connected to the first end of the eighty-third capacitor, the first end of the one hundred and fourth resistor and the gate of the fourteenth MOS tube;

[0104] The drain of the fourteenth MOS tube is electrically connected to the second end of the first coupler;

[0105] The first end of the first coupler is connected to the low voltage power supply through the first resistor;

[0106] The second end of the eighty-third capacitor, the second end of the one hundred and fourth resistor, the source of the fourteenth MOS tube and the third end of the first coupler are grounded.

[0107] The preferred solution forms a DC-DC control module through a plurality of resistors, a plurality of capacitors, MOS tubes and a coupler, so that the DC-DC control module responds to the level control signal output by the main control module when the output voltage of the power supply module is overvoltage or abnormal, and outputs a stop control signal.

[0108] As a preferred solution, the DC-DC conversion circuit includes: a DC-DC conversion chip, a one hundred and seventh resistor, a one hundred and eighth resistor, a one hundred and ninth resistor, a one hundred and tenth resistor, a one hundred and eleventh resistor, a one hundred and twelfth resistor, a ninety-ninth capacitor, a fourth CY capacitor, a fifth CY capacitor, a sixth CY capacitor, a first capacitor parallel sub-circuit and a second capacitor parallel sub-circuit;

[0109] The first end of the first capacitor parallel subcircuit and the first pin of the DC-DC conversion chip serve as the positive input end of the DC-DC conversion circuit;

[0110] The second end of the first capacitor parallel subcircuit, the third pin of the DC-DC conversion chip, the second end of the ninety-ninth capacitor, the first end of the fourth CY capacitor and the first end of the sixth CY capacitor serve as the negative input end of the DC-DC conversion circuit;

[0111] The eighth pin of the DC-DC conversion chip, the second end of the one hundred and seventh resistor and the first end of the second capacitor parallel sub-circuit serve as the output end of the DC-DC conversion circuit;

[0112] The first end of the 108th resistor serves as a control end of the DC-DC conversion circuit, and the second pin of the DC-DC conversion chip receives a stop control signal by being electrically connected to the second end of the 108th resistor; the control end of the DC-DC conversion circuit is used to receive the stop control signal, so that the DC-DC conversion circuit stops working in response to the stop control signal;

[0113] The second pin of the DC-DC conversion chip is electrically connected to the third pin of the DC-DC conversion chip through the ninety-ninth capacitor;

[0114] The seventh pin of the DC-DC conversion chip is electrically connected to the first end of the 107th resistor and the first end of the 109th resistor;

[0115] The sixth pin of the DC-DC conversion chip is electrically connected to the second end of the 109th resistor and the first end of the 110th resistor;

[0116] The second end of the 110th resistor is electrically connected to the first end of the 112th resistor and the fifth pin of the DC-DC conversion chip;

[0117] The one hundred and eleventh resistor is connected in parallel with the one hundred and tenth resistor;

[0118] The second end of the fourth CY capacitor and the first end of the fifth CY capacitor are connected to the ground line;

[0119] The second end of the fifth CY capacitor, the second end of the sixth CY capacitor, the fourth pin of the DC-DC conversion chip, the second end of the 112th resistor and the second end of the second capacitor parallel sub-circuit are grounded.

[0120] This preferred solution forms a DC-DC conversion circuit through a DC-DC conversion chip, a plurality of resistors and a plurality of capacitors, so that the DC-DC conversion circuit can perform voltage conversion on the power supply module, output power supply to power the charging module, and stop working when receiving a stop control signal, so as to prevent the unmanned aerial vehicle onboard charger from remaining in a working state when the output voltage of the power supply module is overvoltage or abnormal, thereby improving the safety of the unmanned aerial vehicle onboard charger.

[0121] As a preferred solution, the main control module includes: a main control subcircuit and a communication subcircuit; the main control subcircuit is used to receive the operating data of the unmanned aerial vehicle onboard charger and output a control signal according to the operating data; the communication subcircuit is used to realize communication between the main control module and the charging module, the host computer, and the battery pack.

[0122] As a preferred solution, the communication subcircuit includes: an I2C interface isolation unit, an RS485 interface unit and an RS422 interface unit; the I2C interface isolation unit is used to realize communication between the main control module and the charging module; the RS485 interface unit is used to realize communication between the main control module and the battery pack; the RS422 interface unit is used to realize communication between the main control module and the host computer.

[0123] This preferred solution can realize the communication between the main control module and the charging module, the host computer and the battery pack respectively through the I2C interface isolation unit, the RS485 interface unit and the RS422 interface unit.

[0124] As a preferred solution, the unmanned aerial vehicle onboard charger further includes: an output voltage checking module, the input end of the output voltage checking module is electrically connected to the output end of the charging module; the output voltage checking module includes: an output voltage checking chip, a forty-sixth resistor, a forty-ninth resistor, a fifty-fourth resistor, a fifty-seventh resistor, a fifty-ninth resistor, a sixtieth resistor, a sixty-second resistor, a sixty-fourth resistor, a sixty-sixth resistor, a thirty-eighth capacitor, a thirty-ninth capacitor, a forty-third capacitor and a first operational amplifier;

[0125] The first end of the forty-sixth resistor serves as the input end of the output voltage checking module;

[0126] The second end of the sixty-second resistor and the first end of the forty-seventh capacitor serve as the output end of the output voltage checking module, and output the output voltage data of the charging module;

[0127] The second end of the forty-sixth resistor is electrically connected to the first end of the fifty-seventh resistor and the first end of the fifty-ninth resistor through the forty-ninth resistor;

[0128] The second end of the fifty-ninth resistor is electrically connected to the first end of the forty-third capacitor and the second pin of the output voltage detection chip;

[0129] The first pin of the output voltage checking chip is electrically connected to the I2C interface isolation unit and the second end of the thirty-ninth capacitor;

[0130] The sixth pin of the output voltage detection chip is electrically connected to the first end of the sixtieth resistor;

[0131] The second end of the sixtieth resistor is electrically connected to the inverting input end of the first operational amplifier and the first end of the sixty-sixth resistor;

[0132] The second end of the sixty-sixth resistor is electrically connected to the output end of the first operational amplifier;

[0133] The seventh pin of the output voltage detection chip is electrically connected to the first end of the fifty-fourth resistor;

[0134] The second end of the fifty-fourth resistor is electrically connected to the non-inverting input end of the first operational amplifier and the first end of the sixty-fourth resistor;

[0135] The positive power supply terminal of the first operational amplifier, the eighth pin of the output voltage detection chip and the first end of the thirty-eighth capacitor are electrically connected to the low voltage power supply;

[0136] The second end of the fifty-seventh resistor, the first end of the thirty-ninth capacitor, the second end of the forty-third capacitor, the third pin of the output voltage checking chip, the fourth pin of the output voltage checking chip, the fifth pin of the output voltage checking chip, the second end of the sixty-fourth resistor, the negative power supply end of the first operational amplifier, the second end of the forty-seventh capacitor and the second end of the thirty-eighth capacitor are grounded.

[0137] The preferred solution forms an output voltage checking module through an output voltage checking chip, a plurality of resistors, a plurality of capacitors, and an operational amplifier, so that the output voltage checking module outputs the output voltage data of the charging module, thereby enabling the main control module to output a corresponding control signal according to the output voltage data of the charging module. BRIEF DESCRIPTION OF THE DRAWINGS

[0138] Figure 1 : A flow chart of an embodiment of a charging method of an unmanned aerial vehicle onboard charger provided by the present invention;

[0139] Figure 2 : A schematic structural diagram of an embodiment of an onboard charger for unmanned aerial vehicles provided by the present invention;

[0140] Figure 3 : A circuit diagram of a charging module provided in an embodiment of the present invention;

[0141] Figure 4 : A circuit diagram of a first charging status indication circuit provided by an embodiment of the present invention;

[0142] Figure 5 : A circuit diagram of a temperature acquisition circuit provided in an embodiment of the present invention;

[0143] Figure 6 : A circuit diagram of a bootstrap circuit provided by an embodiment of the present invention;

[0144] Figure 7 : A circuit diagram of an anti-reverse connection protection circuit provided by an embodiment of the present invention;

[0145] Figure 8 : A circuit diagram of a surge suppression circuit provided by an embodiment of the present invention;

[0146] Fig. 9 : A circuit diagram of an electromagnetic compatibility circuit provided by an embodiment of the present invention;

[0147] Fig.10 : A circuit diagram of a DC-DC control module provided in an embodiment of the present invention;

[0148] Fig.11 : A circuit diagram of a DC-DC conversion circuit provided by an embodiment of the present invention;

[0149] Fig.12 : A circuit diagram of a main single-chip unit provided by an embodiment of the present invention;

[0150] Fig.13 : A circuit diagram of a slave single-chip unit provided by an embodiment of the present invention;

[0151] Fig.14 : A circuit diagram of an I2C interface isolation unit provided in an embodiment of the present invention;

[0152] Fig.15 : A circuit diagram of the RS485 interface unit provided by an embodiment of the present invention;

[0153] Fig.16 : A circuit diagram of the RS422 interface unit provided by an embodiment of the present invention;

[0154] Fig.17 : A circuit diagram of an output voltage checking module provided by an embodiment of the present invention;

[0155] Fig.18 : A circuit diagram of a second charging status indication circuit provided in an embodiment of the present invention. DETAILED DESCRIPTION

[0156] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0157] Embodiment 1

[0158] In order to solve the above technical problems, the present invention provides a charging method for an unmanned aerial vehicle onboard charger.

[0159] Please refer to Figure 1 , which is a flow chart of an embodiment of a charging method for an unmanned aerial vehicle onboard charger provided in an embodiment of the present invention.

[0160] like Figure 1 As shown, the charging method of the unmanned aerial vehicle onboard charger includes steps 101 to 103, specifically:

[0161] Step 101: Collect temperature data; the temperature data includes the ambient temperature or the device temperature when the drone onboard charger is charging;

[0162] Step 102: When the ambient temperature or the device temperature is lower than a first preset temperature, adjusting the charging current according to the temperature data so that the current value of the charging current is lower than a preset value;

[0163] Step 103: When the operating data of the drone onboard charger meets the preset conditions, the charging current is output.

[0164] Furthermore, the charging method of the unmanned aerial vehicle onboard charger further includes:

[0165] The present invention collects temperature data, and when the ambient temperature or the device temperature is lower than a first preset temperature, adjusts the charging current according to the temperature data so that the current value of the charging current is lower than a preset value, and when the operating data of the unmanned aerial vehicle onboard charger meets the preset conditions, outputs a charging current with a current value lower than the preset value. Therefore, the present invention can flexibly adjust the charging current at different temperatures according to the collected temperature data, and output a smaller charging current for charging when the ambient temperature or the device temperature is lower, thereby enabling the unmanned aerial vehicle onboard charger to charge in a low temperature environment.

[0166] When the ambient temperature or the device temperature is greater than a second preset temperature, the charging current is adjusted according to the temperature data so that the current value of the charging current is greater than a preset value; the temperature value of the second preset temperature is greater than the temperature value of the first preset temperature.

[0167] When the ambient temperature or the device temperature is greater than the second preset temperature, the charging current is adjusted according to the temperature data so that the current value of the charging current is greater than the preset value. Therefore, this preferred scheme can adjust the charging current as the ambient temperature changes or the temperature of the device changes during the charging process, thereby achieving charging currents with different current values ​​at different temperatures.

[0168] In this embodiment, the preset conditions are specifically: the output voltage of the power supply module of the unmanned aerial vehicle onboard charger is in the range of [18Vdc, 38Vdc], the output voltage of the charging module of the unmanned aerial vehicle onboard charger is in the range of [14Vdc, 29.4Vdc], the ambient temperature or device temperature is in the range of [-40°C, 55°C], and the unmanned aerial vehicle onboard charger is electrically connected to the battery pack.

[0169] In this embodiment, when the operating data of the drone onboard charger meets the preset conditions, the drone onboard charger will output a charging current to the battery pack, thereby charging the battery pack.

[0170] In this embodiment, one implementation method of adjusting the charging current according to the temperature data is:

[0171] When the ambient temperature or device temperature is between -10°C and 55°C, adjust the charging current to 5A.

[0172] When the ambient temperature or device temperature is [-20℃, -10℃), adjust the charging current to 2A;

[0173] When the ambient temperature or device temperature is between [-40°C, -20°C), adjust the charging current to 1A.

[0174] After the drone onboard charger charges the battery pack at -40℃, the temperature rise will increase. When the temperature rises, the current value of the charging current will be adjusted in this embodiment to increase the charging current. The relationship between low temperature and charging current can be considered at a low temperature of -40℃, and charging of the drone onboard charger can be realized, which effectively solves the technical problem that traditional chargers cannot be charged in a low temperature environment. At the same time, when the battery pack heating function fails, the battery pack is not active at a low temperature such as -40℃. At this time, if a large current is output to the battery pack, the battery pack will be damaged. This embodiment adjusts the current value of the charging current to be less than the preset value at low temperature, which can avoid damage to the battery pack.

[0175] Compared with the prior art, the embodiments of the present invention have the following beneficial effects:

[0176] The present invention collects temperature data, and when the ambient temperature or the device temperature is lower than a first preset temperature, adjusts the charging current according to the temperature data so that the current value of the charging current is lower than a preset value, and when the operating data of the unmanned aerial vehicle onboard charger meets the preset conditions, outputs a charging current with a current value lower than the preset value. Therefore, the present invention can flexibly adjust the charging current at different temperatures according to the collected temperature data, and output a smaller charging current for charging when the ambient temperature or the device temperature is lower, thereby enabling the unmanned aerial vehicle onboard charger to charge in a low temperature environment.

[0177] Embodiment 2

[0178] This embodiment provides an unmanned aerial vehicle onboard charger, including: a power supply module, a temperature acquisition module, a main control module and a charging module;

[0179] The power supply module is used to supply power to the charging module;

[0180] The temperature acquisition module is used to collect temperature data; the temperature data includes the ambient temperature or the device temperature when the unmanned aerial vehicle onboard charger is charging;

[0181] The main control module is used to output a charging current adjustment instruction according to the temperature data;

[0182] The charging module is used to adjust the charging current according to the charging current adjustment instruction, and output the charging current when the operating data of the unmanned aerial vehicle onboard charger meets the preset conditions;

[0183] When used, the drone onboard charger performs the following operations:

[0184] When the main control module determines that the ambient temperature or the device temperature is lower than the first preset temperature, it outputs a charging current adjustment instruction; the charging module adjusts the charging current according to the charging current adjustment instruction so that the current value of the charging current is lower than the preset value; when the operating data of the unmanned aerial vehicle onboard charger meets the preset conditions, the charging current is output.

[0185] In this embodiment, the preset conditions are specifically: the output voltage of the power supply module of the unmanned aerial vehicle onboard charger is in the range of [18Vdc, 38Vdc], the output voltage of the charging module of the unmanned aerial vehicle onboard charger is in the range of [14Vdc, 29.4Vdc], the ambient temperature or device temperature is in the range of [-40°C, 55°C], and the unmanned aerial vehicle onboard charger is electrically connected to the battery pack.

[0186] In this embodiment, the drone onboard charger charges the battery pack by outputting a charging current.

[0187] Furthermore, an implementation method of the charging module for adjusting the charging current according to the charging current adjustment instruction is:

[0188] When the ambient temperature or the device temperature is between -10°C and 55°C, the charging module adjusts the current value of the charging current to 5A according to the charging current adjustment instruction;

[0189] When the ambient temperature or the device temperature is between -20°C and -10°C, the charging module adjusts the current value of the charging current to 2A according to the charging current adjustment instruction;

[0190] When the ambient temperature or the device temperature is between [-40°C, -20°C), the charging module adjusts the current value of the charging current to 1A according to the charging current adjustment instruction.

[0191] After the drone onboard charger charges the battery pack at a low temperature such as -40°C, the temperature rise will increase. When the temperature rises, the main control module in this embodiment will output a charging current adjustment instruction to adjust the charging current so that the charging module adjusts the current value of the charging current according to the charging current adjustment instruction to increase the charging current. Therefore, this embodiment can take into account the relationship between low temperature and charging current under low temperature conditions of -40°C, and realize charging of the drone onboard charger, which effectively solves the technical problem that traditional chargers cannot be charged in low temperature environments; at the same time, when the battery pack heating function fails, the battery pack is not active in a low temperature such as -40°C. At this time, if a large current is output to the battery pack, the battery pack will be damaged. In this embodiment, the current value of the charging current is adjusted to be less than the preset value at low temperatures, which can avoid damage to the battery pack.

[0192] Please refer to the following Figure 2 , Figure 2 The present invention is a schematic structural diagram of an embodiment of an onboard charger for unmanned aerial vehicles provided by the present invention.

[0193] Furthermore, if Figure 2 As shown, the unmanned aerial vehicle onboard charger further includes: a power supply processing module; the input end of the power supply processing module is electrically connected to the power supply; the output end of the power supply processing module is electrically connected to the charging module; the power supply processing module includes an anti-reverse connection protection circuit, a surge suppression circuit, an electromagnetic compatibility circuit and a DC-DC conversion circuit;

[0194] Wherein, the positive input end of the anti-reverse connection protection circuit is used as the positive input end of the power supply processing module; the negative input end of the anti-reverse connection protection circuit is used as the negative input end of the power supply processing module;

[0195] The output end of the DC-DC conversion circuit serves as the output end of the power supply processing module;

[0196] The positive output end of the anti-reverse connection protection circuit is electrically connected to the positive input end of the surge suppression circuit; the negative output end of the anti-reverse connection protection circuit is electrically connected to the negative input end of the surge suppression circuit; the positive output end of the surge suppression circuit is electrically connected to the positive input end of the electromagnetic compatibility circuit; the negative output end of the surge suppression circuit is electrically connected to the negative input end of the electromagnetic compatibility circuit; the positive output end of the electromagnetic compatibility circuit is electrically connected to the positive input end of the DC-DC conversion circuit; the negative output end of the electromagnetic compatibility circuit is electrically connected to the negative input end of the DC-DC conversion circuit;

[0197] The anti-reverse connection protection circuit is used to protect the drone onboard charger from reverse connection;

[0198] The surge suppression circuit is used to limit the surge current at the moment of power-on;

[0199] The electromagnetic compatibility circuit is used to suppress electromagnetic interference;

[0200] The DC-DC conversion circuit is used to perform voltage conversion on the power supply, and the output power supply is used to supply power to the charging module.

[0201] This embodiment forms a power supply processing module through an anti-reverse connection protection circuit, a surge suppression circuit, an electromagnetic compatibility circuit and a DC-DC conversion circuit. Among them, the anti-reverse connection protection circuit can prevent customers from operating incorrectly and improve the safety of using the drone onboard charger. The surge suppression circuit can limit the current at the moment of startup to prevent the power supply module from being pulled down, thereby improving the stability of the drone onboard charger. The electromagnetic compatibility circuit can ensure the operation of the drone onboard charger while isolating the drone onboard charger and other equipment in the drone system. Through the power supply processing module, the safety and stability of the drone onboard charger can be improved.

[0202] Please refer to the following Figure 3 , Figure 3 A circuit diagram of a charging module provided in an embodiment of the present invention.

[0203] Furthermore, if Figure 3 As shown, the charging module includes: an anti-backflow circuit, a charging management chip U1, a first resistor R1, a second resistor R2, a third resistor R3, a fourth resistor R4, a fifth resistor R5, a sixth resistor R6, a seventh resistor R7, an eighth resistor R8, a ninth resistor R9, a tenth resistor R10, an eleventh resistor R11, a twelfth resistor R12, a fourteenth resistor R14, a fifteenth resistor R15, a sixteenth resistor R16, a seventeenth resistor R17, a nineteenth resistor R19, a twenty-third resistor R23, a twenty-fourth resistor R24, a twenty-fifth resistor R25, a twenty-ninth resistor R29, a thirtieth resistor R30, a thirty-second resistor R32, a thirty-fourth resistor R34, a thirty-fifth resistor R35, a thirty-sixth resistor R36, a thirty-eighth resistor R38, a fortieth resistor R40, a first capacitor C1, a sixth capacitor C6, an eighth capacitor C8, a ninth capacitor C9, a thirteenth capacitor C13, a fourteenth capacitor C14, a sixteenth capacitor C16, an eighteenth capacitor C18, a nineteenth capacitor C19, a twenty-third capacitor C23, a twenty-fifth capacitor C25, a twenty-sixth capacitor C26, a twenty-seventh capacitor C27, a twenty-eighth capacitor C28, a twenty-ninth capacitor C29, a thirtieth capacitor C30, a thirty-sixth capacitor C36, a thirty-seventh capacitor C37, a first MOS transistor Q1, a second MOS transistor Q2, a fourth MOS transistor Q4, a fifth MOS transistor Q5, a first inductor L1, and a thermistor RT1;

[0204] The input end of the anti-backflow circuit serves as the input end of the charging module;

[0205] The second end of the first resistor R1, the second end of the second resistor R2, the first end of the fifth resistor R5, the first end of the sixth capacitor C6, the first end of the third resistor R3 and the first end of the eighth capacitor C8 serve as output ends of the charging module to output charging current;

[0206] The output end of the anti-backflow circuit is electrically connected to the first end of the fourth resistor R4 and the first end of the sixteenth resistor R16;

[0207] The seventh resistor R7 and the fourth resistor R4 are connected in parallel;

[0208] A second end of the sixteenth resistor R16 is electrically connected to a first end of the twenty-seventh capacitor C27 and a first end of the twenty-eighth capacitor C28;

[0209] The second end of the fourth resistor R4 is electrically connected to the first end of the fifteenth resistor R15, the first end of the sixteenth capacitor C16, the first end of the fourteenth capacitor C14, the first end of the twelfth resistor R12, the thirty-third pin of the charging management chip U1, the thirty-second pin of the charging management chip U1, the first end of the first capacitor C1 and the drain of the first MOS tube Q1;

[0210] The second end of the fifteenth resistor R15 is electrically connected to the second end of the twenty-seventh capacitor C27, the first end of the twenty-ninth capacitor C29 and the twenty-ninth pin of the charging management chip U1;

[0211] The second end of the ninth capacitor C9 is electrically connected to the twenty-third pin of the charging management chip U1;

[0212] A second end of the twelfth resistor R12 is electrically connected to the thirty-fourth pin of the charging management chip U1 and a first end of the seventeenth resistor R17;

[0213] The second end of the seventeenth resistor R17 is electrically connected to the first end of the nineteenth resistor R19, the first end of the thirtieth capacitor C30 and the thirty-fifth pin of the charging management chip U1;

[0214] The twenty-fourth pin of the charging management chip U1 is electrically connected to the first end of the twenty-sixth capacitor C26 and the first end of the twenty-third resistor R23;

[0215] A second end of the twenty-third resistor R23 is electrically connected to a first end of the thirty-fifth resistor R35, a first end of the thermistor RT1, and an eighth pin of the charging management chip U1;

[0216] The thirty-sixth pin of the charging management chip U1 is electrically connected to the first end of the thirty-second resistor R32;

[0217] The ninth pin of the charging management chip U1 is electrically connected to the first end of the thirty-fourth resistor R34 and the first end of the thirty-eighth resistor R38;

[0218] A second end of the thirty-fourth resistor R34 is electrically connected to a first end of the thirty-sixth capacitor C36;

[0219] The tenth pin of the charging management chip U1 is electrically connected to the first end of the thirty-sixth resistor R36 and the first end of the fortieth resistor R40;

[0220] A second end of the thirty-sixth resistor R36 is electrically connected to a first end of the thirty-seventh capacitor C37;

[0221] The twenty-seventh pin of the charging management chip U1 is electrically connected to the gate of the first MOS transistor Q1 and the first end of the eleventh resistor R11 through the ninth resistor R9;

[0222] The source of the first MOS transistor Q1 is electrically connected to the second end of the eleventh resistor R11, the first end of the first inductor L1, the drain of the fifth MOS transistor Q5 and the twenty-eighth pin of the charging management chip U1;

[0223] The gate of the fifth MOS transistor Q5 is electrically connected to the twenty-fifth pin of the charging management chip U1 through the twenty-fourth resistor R24; the gate of the fifth MOS transistor Q5 is electrically connected to the first end of the twenty-ninth resistor R29;

[0224] The nineteenth pin of the charging management chip U1 is electrically connected to the first end of the tenth resistor R10 and the gate of the second MOS transistor Q2 through the eighth resistor R8;

[0225] The second end of the tenth resistor R10 is electrically connected to the source of the second MOS transistor Q2, the second end of the first inductor L1, the drain of the fourth MOS transistor Q4 and the eighteenth pin of the charging management chip U1;

[0226] The twenty-first pin of the charging management chip U1 is electrically connected to the first end of the thirtieth resistor R30 and the gate of the fourth MOS transistor Q4 through the twenty-fifth resistor R25;

[0227] The drain of the second MOS transistor Q2 is electrically connected to the first end of the first resistor R1, the first end of the second resistor R2 and the first end of the sixth resistor R6;

[0228] The second end of the sixth resistor R6 is electrically connected to the first end of the thirteenth capacitor C13, the first end of the eighteenth capacitor C18 and the fourteenth pin of the charging management chip U1;

[0229] The second end of the fifth resistor R5 is electrically connected to the second end of the thirteenth capacitor C13, the first end of the nineteenth resistor R19 and the thirteenth pin of the charging management chip U1;

[0230] The twelfth pin of the charging management chip U1 is electrically connected to the second end of the third resistor R3, the second end of the eighth capacitor C8 and the first end of the fourteenth resistor R14;

[0231] A second end of the fourteenth resistor R14 is electrically connected to the eleventh pin of the charging management chip U1;

[0232] The second end of the twenty-eighth capacitor C28, the second end of the twenty-ninth capacitor C29, the second end of the sixteenth capacitor C16, the second end of the fourteenth capacitor C14, the second end of the nineteenth resistor R19, the second end of the thirtieth capacitor C30, the first end of the ninth capacitor C9, the second end of the twenty-sixth capacitor C26, the second end of the thirty-fifth resistor R35, the second end of the thermistor RT1, the second end of the first capacitor C1, the second end of the thirty-second resistor R32, the second end of the thirty-sixth capacitor C36, the second end of the thirty-eighth resistor R38, the second end of the thirty-seventh capacitor C37, the second end of the fortieth resistor R40, the second end of the twenty-ninth resistor R29, the source of the fifth MOS tube Q5, the second end of the thirtieth resistor R30, the source of the fourth MOS tube Q4, the second end of the eighteenth capacitor C18, the second end of the nineteenth capacitor C19, the second end of the sixth capacitor C6, the seventeenth pin of the charging management chip U1, the twenty-second pin of the charging management chip U1 and the thirty-seventh pin of the charging management chip U1 are grounded.

[0233] In this embodiment, the model of the charging management chip U1 is BQ25756RRVR.

[0234] In this embodiment, the charging module can convert DC31V direct current into a direct current voltage of 29.4V to charge the battery pack, and manage the charging and discharging of the battery pack.

[0235] Furthermore, if Figure 3 As shown, the anti-backflow circuit is used to prevent the voltage of the rear-stage circuit from backflowing to the front-stage circuit; the anti-backflow circuit includes an N+1 redundant chip N1, a fourth capacitor C4, a fifth capacitor C5, a twentieth capacitor C20, a twenty-first capacitor C21, a twenty-second capacitor C22, a twenty-fourth capacitor C24 and a third MOS tube Q3;

[0236] The first end of the twentieth capacitor C20, the first end of the twenty-first capacitor C21, the ANODE pin of the N+1 redundant chip N1, the EN pin of the N+1 redundant chip N1 and the drain of the third MOS tube Q3 serve as the input end of the anti-backflow circuit;

[0237] The source of the third MOS transistor Q3, the second end of the fourth capacitor C4, the second end of the fifth capacitor C5, the first end of the twenty-second capacitor C22, the first end of the twenty-fourth capacitor C24 and the CATHODE pin of the N+1 redundant chip N1 serve as the output end of the anti-backflow circuit;

[0238] A second end of the twenty-first capacitor C21 is electrically connected to the VCAP pin of the N+1 redundant chip N1;

[0239] The gate of the third MOS transistor Q3 is electrically connected to the GATE pin of the N+1 redundant chip N1;

[0240] A second end of the twentieth capacitor C20, a GND pin of the N+1 redundant chip N1, a first end of the fourth capacitor C4, a first end of the fifth capacitor C5, a second end of the twenty-second capacitor C22 and a second end of the twenty-fourth capacitor C24 are grounded.

[0241] In this embodiment, the model of the N+1 redundant chip N1 is RMJ5700D.

[0242] This embodiment forms an anti-backflow circuit through N+1 redundant chips, a number of capacitors and MOS tubes, which can prevent the voltage of the subsequent circuit from backflowing to the previous circuit.

[0243] In this embodiment, the charging module further includes a bootstrap circuit, a temperature acquisition circuit and a first charging state indication circuit.

[0244] Please refer to the following Figures 4 to 6 , Figure 4 A circuit diagram of a first charging status indication circuit provided by an embodiment of the present invention, Figure 5 A circuit diagram of a temperature acquisition circuit provided by an embodiment of the present invention, Figure 6 A circuit diagram of a bootstrap circuit provided in an embodiment of the present invention.

[0245] like Figure 4 As shown, in this embodiment, a first charging status indication circuit is formed by a plurality of resistors, a plurality of capacitors and a plurality of light-emitting diodes, wherein the light-emitting diode D1 is used to indicate the normal state of the charging management chip, and the light-emitting diode D2 and the light-emitting diode D3 are used to indicate the various charging states of the unmanned aerial vehicle onboard charger; wherein, when the light-emitting diode D2 is lit and the light-emitting diode D3 is off, it indicates the charging state; when the light-emitting diode D2 is off and the light-emitting diode D3 is lit, it indicates the charging completion state; when the light-emitting diode D2 is lit and the light-emitting diode D3 is lit, it indicates a charging fault; when the light-emitting diode D2 is off and the light-emitting diode D3 is off, it indicates that charging is prohibited.

[0246] like Figure 5 As shown, in this embodiment, the temperature sensor Q9 collects the temperature of the charging module, that is, the device temperature, and transmits the device temperature to the main control module in real time through the port TD, so that the main control module decides whether to start charging according to the device temperature.

[0247] like Figure 6 As shown, this embodiment forms a bootstrap circuit through capacitors, resistors and diodes. The bootstrap circuit uses the energy storage characteristics of the capacitor to superimpose the capacitor discharge voltage and the circuit input voltage. The diode prevents current backflow, thereby increasing the voltage in the charging module.

[0248] In this embodiment, when the charging module detects that the input voltage and current of the charging module are normal, the charging module is electrically connected to the battery pack, the temperature data is normal, and the output voltage and current of the charging module are normal, the charging function will be turned on to output the charging current.

[0249] Specifically, the fourth resistor R4 and the seventh resistor R7 are input current check resistors, the twelfth resistor R12, the seventeenth resistor R17 and the nineteenth resistor R19 are input over-voltage and under-voltage level detection resistors. Through the above resistors, the charging module can detect whether the input voltage and current values ​​of the power supply module are within the normal range. If it is detected that the input voltage and current values ​​of the power supply module are not within the normal range, the charging management chip U1 will be turned off; wherein, the input current value is set to 10A, the input undervoltage value is set to 8V, and the input overvoltage value is set to 43V.

[0250] Specifically, based on the charging management chip U1, the charging module can determine whether the drone onboard charger is electrically connected to the battery pack through the eleventh pin of the charging management chip U1. If a battery pack is connected, the feedback pin FBG1 connected to the eleventh pin FBG of the charging management chip U1 is grounded through the inside of the charging management chip U1, thereby establishing a battery feedback voltage and completing the electrical connection between the drone onboard charger and the battery pack.

[0251] Specifically, the forty-second resistor R42, the thirty-fifth resistor R35 and the thermistor RT1 are temperature checking resistors. The temperature checking resistors are electrically connected to the eighth pin TS of the charging management chip U1 to realize the collection of the device temperature. The collected device temperature can be fed back to the main control module through the I2C interface isolation unit.

[0252] Specifically, the first resistor R1 and the second resistor R2 are current checking resistors, the thirty-eighth resistor R38 and the thirty-ninth resistor R39 are charging current setting resistors. Through the current checking resistors, the charging module can check whether the output voltage and current of the charging module are normal. When the output voltage and current of the charging module are abnormal, the charging management chip U1 will be shut down.

[0253] Furthermore, the main control module is also used to receive operating data of the unmanned aerial vehicle onboard charger and output a control signal based on the operating data; the control signal is used to control the output of the charging current; the operating data includes charging module output voltage data, temperature data and power supply module output voltage data; the main control module is also used to output a low-voltage power supply.

[0254] This embodiment can output a control signal according to the operating data of the drone onboard charger, thereby controlling the output of the charging current and realizing the operation monitoring of the drone onboard charger itself.

[0255] Please refer to the following Figure 7 , Figure 7A circuit diagram of an anti-reverse connection protection circuit provided in an embodiment of the present invention.

[0256] Furthermore, if Figure 7 As shown, the anti-reverse connection protection circuit includes: a first fuse F1, an eighty-first resistor R81, an eighty-third resistor R83, an eighty-seventh resistor R87, a fourth voltage regulator diode V4 and a twelfth MOS tube Q12;

[0257] The first end of the first fuse F1 serves as the positive input end of the anti-reverse connection protection circuit;

[0258] The drain of the twelfth MOS tube Q12 serves as the negative input terminal of the anti-reverse connection protection circuit;

[0259] The second end of the first fuse F1 and the first end of the eighty-first resistor R81 serve as the positive output end of the anti-reverse connection protection circuit;

[0260] The second end of the eighty-seventh resistor R87, the anode of the fourth voltage stabilizing diode V4 and the source of the twelfth MOS transistor Q12 serve as the negative output end of the anti-reverse connection protection circuit;

[0261] The second end of the eighty-first resistor R81 is electrically connected to the first end of the eighty-third resistor R83;

[0262] A second end of the eighty-third resistor R83 is electrically connected to the gate of the twelfth MOS transistor Q12, a first end of the eighty-seventh resistor R87 and a cathode of the fourth voltage stabilizing diode V4.

[0263] In this embodiment, the fourth voltage stabilizing diode V4 can provide a stable 10V voltage for the base of the twelfth MOS transistor Q12, so that the twelfth MOS transistor Q12 works in a fully-on state.

[0264] This embodiment forms an anti-reverse connection protection circuit through a fuse, a number of resistors, a voltage-stabilizing diode and a MOS tube. The anti-reverse connection protection circuit will only be turned on when V1+ is connected to a positive voltage and V1- is connected to a negative voltage. Therefore, this embodiment can prevent customers from operating incorrectly and improve the safety of using the drone onboard charger.

[0265] Please refer to the following Figure 8 , Figure 8 A circuit diagram of a surge suppression circuit provided in an embodiment of the present invention.

[0266] Furthermore, if Figure 8As shown, the surge suppression circuit includes: an eighty-second resistor R82, an eighty-fourth resistor R84, an eighty-fifth resistor R85, an eighty-sixth resistor R86, an eighty-eighth resistor R88, a ninety-first resistor R91, a ninety-third resistor R93, a ninety-fourth resistor R94, a seventy-fourth capacitor C74, a seventy-seventh capacitor C77, a seventy-eighth capacitor C78, ​​a third voltage stabilizing diode V3, a tenth transistor Q10 and an eleventh MOS transistor Q11;

[0267] The first end of the eighty-second resistor R82 and the first end of the seventy-fourth capacitor C74 serve as a positive input terminal and a positive output terminal of the surge suppression circuit;

[0268] The second end of the eighty-eighth resistor R88, the anode of the third voltage stabilizing diode V3, the collector of the tenth transistor Q10, the second end of the seventy-seventh capacitor C77, the second end of the seventy-eighth capacitor C78, ​​the first end of the ninety-first resistor R91, the first end of the ninety-fourth resistor R94 and the source of the eleventh MOS transistor Q11 serve as the negative input end of the surge suppression circuit;

[0269] The drain of the eleventh MOS tube Q11, the second end of the ninetieth resistor R90, the second end of the ninety-third resistor R93 and the second end of the seventy-fourth capacitor C74 serve as the negative output end of the surge suppression circuit;

[0270] The second end of the eighty-second resistor R82 is electrically connected to the first end of the eighty-fourth resistor R84;

[0271] The second end of the eighty-fourth resistor R84 is electrically connected to the first end of the eighty-eighth resistor R88, the cathode of the third voltage zener diode V3, the base of the transistor Q10 and the first end of the eighty-fifth resistor R85;

[0272] The emitter of the thirteenth transistor Q10 is electrically connected to the first end of the eighty-sixth resistor R86;

[0273] The second end of the eighty-sixth resistor R86 is electrically connected to the second end of the eighty-fifth resistor R85, the first end of the seventy-seventh capacitor C77, the first end of the seventy-eighth capacitor C78 and the source of the eleventh MOS tube Q11.

[0274] In this embodiment, the surge suppression circuit limits the surge current at the power-on moment through the ninetieth resistor R90, the ninety-first resistor R91, the ninety-third resistor R93 and the ninety-fourth resistor R94, reduces the instantaneous current when the switch is closed, and prevents the power supply from being pulled down due to excessive startup current, thereby improving the stability of the unmanned aerial vehicle onboard charger; in addition, this embodiment can use the input voltage at the input end of the surge suppression circuit divided by the resistance value of the circuit composed of the ninetieth resistor R90, the ninety-first resistor R91, the ninety-third resistor R93 and the ninety-fourth resistor R94 to calculate the surge suppression current.

[0275] In this embodiment, the third voltage stabilizing diode V3 can provide a stable 10V voltage for the base of the eleventh MOS transistor Q11, so that the eleventh MOS transistor Q11 works in a fully-on state.

[0276] In this embodiment, the eleventh MOS transistor Q11 is a PNP transistor.

[0277] Compared with the traditional surge suppression circuit, in which the discharge time between the gate and the source of the MOS tube is long when the power is turned off, and frequent switching on and off can easily damage the MOS tube, the present embodiment adds a fast discharge circuit including a thirteenth transistor Q10 between the gate and the source of the eleventh MOS tube Q11, which can reduce the discharge time of the eleventh MOS tube Q11 from hundreds of mS to tens of mS.

[0278] This embodiment forms a surge suppression circuit through a plurality of resistors, a plurality of capacitors, a voltage stabilizing diode, a transistor and a MOS tube, which can limit the current at the moment of startup, prevent the power supply module from being pulled down, and improve the stability of the drone onboard charger.

[0279] Please refer to the following Fig. 9 , Fig. 9 A circuit diagram of an electromagnetic compatibility circuit provided by an embodiment of the present invention.

[0280] Furthermore, if Fig. 9 As shown, the electromagnetic compatibility circuit includes: a sixty-seventh capacitor C67, a sixty-ninth capacitor C69, a seventy-first capacitor C70, a seventy-first capacitor C71, a seventy-second capacitor C72, a seventy-third capacitor C73, a seventy-fourth capacitor C74, a seventy-fifth capacitor C75, a second common mode inductor L2 and a third common mode inductor L3;

[0281] The first end of the seventy-fourth capacitor C74, the first end of the seventy-second capacitor C72, and the third end of the second common mode inductor L2 serve as the positive input end of the electromagnetic compatibility circuit;

[0282] The second end of the seventy-fourth capacitor C74, the second end of the seventy-second capacitor C72 and the second end of the second common mode inductor L2 serve as a negative input end of the electromagnetic compatibility circuit;

[0283] The fourth end of the third common mode inductor L3, the first end of the sixty-seventh capacitor C67, the first end of the seventy-first capacitor C71 and the first end of the seventy-third capacitor C73 serve as the positive output end of the electromagnetic compatibility circuit;

[0284] The first end of the third common mode inductor L3, the second end of the seventy-fifth capacitor C75, the second end of the seventy-first capacitor C71 and the second end of the seventy-third capacitor C73 serve as the negative output end of the electromagnetic compatibility circuit;

[0285] The fourth end of the second common mode inductor L2 is electrically connected to the first end of the sixty-ninth capacitor C69, the first end of the seventieth capacitor C70 and the third end of the third common mode inductor L3;

[0286] A first end of the second common-mode inductor L2 is electrically connected to a second end of the sixty-ninth capacitor C69, a second end of the seventieth capacitor C70, and a second end of the third common-mode inductor L3;

[0287] A second end of the sixty-seventh capacitor C67 and a first end of the seventy-fifth capacitor C75 are connected to the ground line.

[0288] In this embodiment, the number of electronic components in the electromagnetic compatibility circuit can be reduced or increased according to actual debugging conditions.

[0289] This embodiment forms an electromagnetic compatibility circuit through a number of capacitors and common-mode inductors, which can ensure the operation of the drone onboard charger while isolating the drone onboard charger box and other equipment in the drone system.

[0290] In this embodiment, the common-mode inductor is wound with a magnetic core, and its inductance can reach the mH level; the inductance of the common-mode inductor and the capacitance value of each capacitor can be flexibly adjusted to meet the CE102 electromagnetic compatibility requirements, so that the drone onboard charger does not interfere with the surrounding electrical equipment when working, and the operation of the surrounding electrical equipment does not interfere with the operation of the drone onboard charger.

[0291] Furthermore, the unmanned aerial vehicle onboard charger further includes: a DC-DC control module for responding to a level control signal output by the main control module when the output voltage of the power supply module is overvoltage or abnormal, and outputting a stop control signal.

[0292] Please refer to the following Fig.10 , Fig.10 A circuit diagram of a DC-DC control module provided in an embodiment of the present invention.

[0293] like Fig.10 As shown, the DC-DC control module includes: a 100th resistor R100, a 104th resistor R104, a 105th resistor R105, a 106th resistor R106, an 83rd capacitor C83, a 14th MOS tube Q14 and a first coupler U9;

[0294] The first end of the one hundred and fifth resistor R105 is used for receiving the level control signal;

[0295] The fourth end of the first coupler U9 is used to output a stop control signal;

[0296] The second end of the one hundred and fifth resistor R105 is electrically connected to the first end of the one hundred and sixth resistor R106;

[0297] A second end of the one hundred and sixth resistor R106 is electrically connected to a first end of the eighty-third capacitor C83, a first end of the one hundred and fourth resistor R104, and a gate of the fourteenth MOS transistor Q14;

[0298] The drain of the fourteenth MOS tube Q14 is electrically connected to the second end of the first coupler U9;

[0299] The first end of the first coupler U9 is connected to the low voltage power supply through the first resistor R100;

[0300] The second end of the eighty-third capacitor C83, the second end of the one hundred and fourth resistor R104, the source of the fourteenth MOS tube Q14 and the third end of the first coupler U9 are grounded.

[0301] In this embodiment, a DC-DC control module is formed by a plurality of resistors, a plurality of capacitors, MOS tubes and a coupler, so that the DC-DC control module responds to a level control signal output by the main control module when the output voltage of the power supply module is overvoltage or abnormal, and outputs a stop control signal.

[0302] Please refer to the following Fig.11 , Fig.11 A circuit diagram of a DC-DC conversion circuit provided in an embodiment of the present invention.

[0303] Furthermore, if Fig.11 As shown, the DC-DC conversion circuit includes: a DC-DC conversion chip G2, a one-hundred-and-seventh resistor R107, a one-hundred-and-eighth resistor R108, a one-hundred-and-ninth resistor R109, a one-hundred-and-eleventh resistor R110, a one-hundred-and-eleventh resistor R111, a one-hundred-and-twelfth resistor R112, a ninety-ninth capacitor C99, a fourth CY capacitor CY4, a fifth CY capacitor CY5, a sixth CY capacitor CY6, a first capacitor parallel sub-circuit and a second capacitor parallel sub-circuit;

[0304] The first end of the first capacitor parallel sub-circuit and the first pin of the DC-DC conversion chip G2 serve as the positive input end of the DC-DC conversion circuit;

[0305] The second end of the first capacitor parallel subcircuit, the third pin of the DC-DC conversion chip G2, the second end of the ninety-ninth capacitor C99, the first end of the fourth CY capacitor CY4 and the first end of the sixth CY capacitor CY6 serve as the negative input end of the DC-DC conversion circuit;

[0306] The eighth pin of the DC-DC conversion chip G2, the second end of the one hundred and seventh resistor R107, and the first end of the second capacitor parallel sub-circuit serve as the output end of the DC-DC conversion circuit;

[0307] The first end of the 108th resistor R108 serves as a control end of the DC-DC conversion circuit, and the second pin of the DC-DC conversion chip G2 receives a stop control signal by being electrically connected to the second end of the 108th resistor R108; the control end of the DC-DC conversion circuit is used to receive the stop control signal, so that the DC-DC conversion circuit stops working in response to the stop control signal;

[0308] The second pin of the DC-DC conversion chip G2 is electrically connected to the third pin of the DC-DC conversion chip G2 through the ninety-ninth capacitor C99;

[0309] The seventh pin of the DC-DC conversion chip G2 is electrically connected to the first end of the one hundred and seventh resistor R107 and the first end of the one hundred and ninth resistor R109;

[0310] The sixth pin of the DC-DC conversion chip G2 is electrically connected to the second end of the one hundred and ninth resistor R109 and the first end of the one hundred and tenth resistor R110;

[0311] The second end of the 110th resistor R110 is electrically connected to the first end of the 112th resistor R112 and the fifth pin of the DC-DC conversion chip G2;

[0312] The one hundred and eleventh resistor R111 is connected in parallel with the one hundred and tenth resistor R110;

[0313] A second end of the fourth CY capacitor CY4 and a first end of the fifth CY capacitor CY5 are connected to the ground line;

[0314] The second end of the fifth CY capacitor CY5, the second end of the sixth CY capacitor CY6, the fourth pin of the DC-DC conversion chip G2, the second end of the 112th resistor R112 and the second end of the second capacitor parallel sub-circuit are grounded.

[0315] In this embodiment, the DC-DC conversion circuit is not limited to the above-mentioned structure.

[0316] In this embodiment, the DC-DC conversion circuit is used to convert the voltage of the power supply module, and the output power supply is used to power the charging module. Specifically, the DC-DC conversion circuit can be used to convert a DC voltage in a wide range of DC18-DC38V into a stable 31V DC voltage.

[0317] In this embodiment, the first capacitor parallel sub-circuit and the second capacitor parallel sub-circuit are parallel circuits composed of a plurality of capacitors.

[0318] In this embodiment, a DC-DC conversion circuit is formed by a DC-DC conversion chip, a plurality of resistors and a plurality of capacitors, so that the DC-DC conversion circuit can perform voltage conversion on the power supply module, output power supply to power the charging module, and stop working when receiving a stop control signal, so as to prevent the unmanned aerial vehicle onboard charger from being in a working state when the output voltage of the power supply module is overvoltage or abnormal, thereby improving the safety of the unmanned aerial vehicle onboard charger.

[0319] Furthermore, the main control module includes: a main control subcircuit and a communication subcircuit; the main control subcircuit is used to receive the operating data of the unmanned aerial vehicle onboard charger and output a control signal according to the operating data; the communication subcircuit is used to realize the communication between the main control module and the charging module, the host computer, and the battery pack.

[0320] In this embodiment, the main control sub-circuit includes a master single-chip microcomputer unit and a slave single-chip microcomputer unit.

[0321] Please refer to the following Fig.12 and Fig.13 , Fig.12 A circuit diagram of a main single-chip unit provided by an embodiment of the present invention, Fig.13 A circuit diagram of a slave single-chip unit provided in an embodiment of the present invention.

[0322] like Fig.12 and Fig.13 As shown, the master single-chip unit is composed of a master single-chip chip U18 and its peripheral circuits, and the slave single-chip unit is composed of a slave single-chip chip U14 and its peripheral circuits.

[0323] In this embodiment, the models of the slave single-chip microcomputer chip U14 and the master single-chip microcomputer chip U18 are GD32F13RET6.

[0324] Furthermore, the communication subcircuit includes: an I2C interface isolation unit, an RS485 interface unit and an RS422 interface unit; the I2C interface isolation unit is used to realize communication between the main control module and the charging module; the RS485 interface unit is used to realize communication between the main control module and the battery pack; the RS422 interface unit is used to realize communication between the main control module and the host computer.

[0325] In this embodiment, the I2C interface isolation unit can isolate the main control module from the charging module, the RS485 interface unit can isolate the main control module from the battery pack, and the RS422 interface unit can isolate the main control module from the host computer, thereby preventing interference and reducing the probability of failure, thereby improving the stability and reliability of the unmanned aerial vehicle onboard charger; through the RS485 interface unit, the main control module can collect information such as the voltage, current, and temperature of the battery pack in real time, and through the RS422 interface unit, the main control module can feed back information such as the charging status, battery pack voltage, current, and temperature to the host computer in real time, and the host computer can also send instructions to the main control module in real time, so that the main control module controls the working status of the unmanned aerial vehicle onboard charger.

[0326] In this embodiment, when the battery pack is fully charged, the charging module can send a full-charge indication command to the main control module through the I2C interface isolation unit, and the main control module uploads the full-charge indication command to the battery pack through the RS485 interface unit.

[0327] In this embodiment, through the RS485 interface unit, the battery pack can send the battery pack status to the slave microcontroller unit in real time. The battery pack status includes battery pack voltage, battery pack current, battery pack temperature, battery pack fault data and battery pack full charge data; the slave microcontroller unit then sends the received data to the master microcontroller unit, and the master microcontroller unit processes the received data and sends it to the host computer through the RS422 interface unit; wherein, the master microcontroller unit transmits data to the host computer at a fixed 1S interval, sending 2 frames each time, with a communication rate of 115200bit / s, and the character format is 8-bit character length, 1 stop bit, no parity check, and no flow control.

[0328] Please refer to the following Figures 14 to 16 , Fig.14 A circuit diagram of an I2C interface isolation unit provided in an embodiment of the present invention, Fig.15 The circuit diagram of the RS485 interface unit provided by the embodiment of the present invention, Fig.16 A circuit diagram of an RS422 interface unit provided in an embodiment of the present invention.

[0329] In this embodiment, the I2C interface isolation unit is composed of an I2C interface isolation chip U15 and its peripheral circuits; the RS485 interface unit is composed of an RS485 chip U16 and its peripheral circuits; the RS422 interface unit is composed of an RS422 chip U17 and its peripheral circuits; wherein, the model of the I2C interface isolation chip U15 is NSI8100N, the model of the RS485 chip U16 is NSI83086, and the model of the RS422 chip U17 is SIT3491ISO.

[0330] This embodiment uses the I2C interface isolation unit, RS485 interface unit and RS422 interface unit to respectively realize communication between the main control module and the charging module, the host computer and the battery pack, realize human-computer interaction, and improve the intelligence of the drone onboard charger.

[0331] Please refer to the following Fig.17 , Fig.17 A circuit diagram of an output voltage checking module provided in an embodiment of the present invention.

[0332] Furthermore, the unmanned aerial vehicle onboard charger further includes: an output voltage checking module, wherein an input end of the output voltage checking module is electrically connected to an output end of the charging module.

[0333] like Fig.17 As shown, the output voltage checking module includes: an output voltage checking chip U4, a 46th resistor R46, a 49th resistor R49, a 54th resistor R54, a 57th resistor R57, a 59th resistor R59, a 60th resistor R60, a 62nd resistor R62, a 64th resistor R64, a 66th resistor R66, a 38th capacitor C38, a 39th capacitor C39, a 43rd capacitor C43 and a first operational amplifier U3;

[0334] A first end of the forty-sixth resistor R46 serves as an input end of the output voltage checking module;

[0335] The second end of the sixty-second resistor R62 and the first end of the forty-seventh capacitor C47 serve as the output end of the output voltage checking module to output the output voltage data of the charging module;

[0336] The second end of the forty-sixth resistor R46 is electrically connected to the first end of the fifty-seventh resistor R57 and the first end of the fifty-ninth resistor R59 through the forty-ninth resistor R49;

[0337] A second end of the fifty-ninth resistor R59 is electrically connected to a first end of the forty-third capacitor C43 and a second pin of the output voltage detection chip U4;

[0338] The first pin of the output voltage detection chip U4 is electrically connected to the I2C interface isolation unit and the second end of the thirty-ninth capacitor C39;

[0339] The sixth pin of the output voltage detection chip U4 is electrically connected to the first end of the sixtieth resistor R60;

[0340] A second end of the sixtieth resistor R60 is electrically connected to the inverting input end of the first operational amplifier U3 and a first end of the sixty-sixth resistor R66;

[0341] A second end of the sixty-sixth resistor R66 is electrically connected to the output end of the first operational amplifier U3;

[0342] The seventh pin of the output voltage detection chip U4 is electrically connected to the first end of the fifty-fourth resistor R54;

[0343] A second end of the fifty-fourth resistor R54 is electrically connected to the non-inverting input end of the first operational amplifier U3 and a first end of the sixty-fourth resistor R64;

[0344] The positive power supply terminal of the first operational amplifier U3, the eighth pin of the output voltage detection chip U4 and the first end of the thirty-eighth capacitor C38 are electrically connected to the low voltage power supply;

[0345] The second end of the fifty-seventh resistor R57, the first end of the thirty-ninth capacitor C39, the second end of the forty-third capacitor C43, the third pin of the output voltage check chip U4, the fourth pin of the output voltage check chip U4, the fifth pin of the output voltage check chip U4, the second end of the sixty-fourth resistor R64, the negative power supply end of the first operational amplifier U3, the second end of the forty-seventh capacitor C47 and the second end of the thirty-eighth capacitor C38 are grounded.

[0346] In this embodiment, the model of the output voltage check chip U4 is NSI1311-DSWVR. Based on the output voltage check chip U4, the charging module can manage the charging and discharging status of the battery pack and realize functions such as charging status check, fast charging, and full charging.

[0347] In this embodiment, the output voltage checking module can be electrically connected to the main control module via the SCDY pin, thereby outputting the output voltage data of the charging module to the main control module, so that the main control module can determine whether the battery pack is fully charged, under-voltage or faulty according to the output voltage data of the charging module, thereby checking the status of the charging module in real time. If a fault is found, the charging can be shut down immediately, thereby reducing the probability of failure of the unmanned aerial vehicle onboard charger and improving the reliability of the unmanned aerial vehicle onboard charger.

[0348] In this embodiment, an output voltage checking module is formed by an output voltage checking chip, a plurality of resistors, a plurality of capacitors, and an operational amplifier. The output voltage checking module can output the output voltage data of the charging module, and the output voltage data of the charging module reflects the charging voltage of the battery pack. The output voltage checking module can transmit the battery charging voltage to the main control module in real time, so that the main control module can output a corresponding control signal according to the output voltage data of the charging module.

[0349] Please refer to the following Fig.18 , Fig.18 A circuit diagram of a second charging status indication circuit provided by an embodiment of the present invention.

[0350] In this embodiment, the second charging status indication circuit can indicate the charging status of the drone onboard charger, such as full charge indication, fault indication, and battery pack battery capacity indication.

[0351] In this embodiment, the MOS tube or triode in the drone onboard charger can be a low-resistance switch tube, which can improve the reliability, response speed and operating efficiency of the drone onboard charger and reduce operating costs.

[0352] Compared with the prior art, the embodiments of the present invention have the following beneficial effects:

[0353] The present invention forms an unmanned aerial vehicle onboard charger through a charging module and a main control module. When the main control module determines that the ambient temperature or the device temperature is lower than a first preset temperature, the charging current reduction instruction is outputted, so that the charging module determines the charging current according to the charging current reduction instruction, and outputs a smaller charging current based on the power supply module when the operating data of the unmanned aerial vehicle onboard charger meets the preset conditions. The present invention can flexibly adjust the charging current at different temperatures through the main control module and the charging module, and output a smaller charging current for charging when the ambient temperature or the device temperature is lower, thereby realizing charging of the unmanned aerial vehicle onboard charger in a low temperature environment.

[0354] The specific embodiments described above further illustrate the purpose, technical solutions and beneficial effects of the present invention. It should be understood that the above description is only a specific embodiment of the present invention and is not intended to limit the scope of protection of the present invention. It is particularly pointed out that for those skilled in the art, any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention should be included in the scope of protection of the present invention.

Claims

1. A charging method for an unmanned aerial vehicle onboard charger, characterized in that: include: Collect temperature data; the temperature data includes ambient temperature or device temperature when the drone onboard charger is charging; When the ambient temperature or the device temperature is lower than the first preset temperature, adjusting the charging current according to the temperature data so that the current value of the charging current is lower than the preset value; When the operating data of the drone onboard charger meets the preset conditions, the charging current is output.

2. A charging method for an unmanned aerial vehicle onboard charger as claimed in claim 1, characterized in that: Also includes: When the ambient temperature or the device temperature is greater than a second preset temperature, adjusting the charging current according to the temperature data so that the current value of the charging current is greater than a preset value; The temperature value of the second preset temperature is greater than the temperature value of the first preset temperature.

3. An unmanned aerial vehicle charger, characterized in that: include: Power supply module, temperature acquisition module, main control module and charging module; The power supply module is used to supply power to the charging module; The temperature acquisition module is used to collect temperature data; the temperature data includes the ambient temperature or the device temperature when the unmanned aerial vehicle onboard charger is charging; The main control module is used to output a charging current adjustment instruction according to the temperature data; The charging module is used to adjust the charging current according to the charging current adjustment instruction, and output the charging current when the operating data of the unmanned aerial vehicle onboard charger meets the preset conditions; When used, the drone onboard charger performs the following operations: When the main control module determines that the ambient temperature or the device temperature is lower than the first preset temperature, it outputs a charging current adjustment instruction; the charging module adjusts the charging current according to the charging current adjustment instruction so that the current value of the charging current is lower than the preset value; when the operating data of the unmanned aerial vehicle onboard charger meets the preset conditions, the charging current is output.

4. The drone onboard charger according to claim 3, characterized in that: The charging module includes: an anti-backflow circuit, a charging management chip, a first resistor, a second resistor, a third resistor, a fourth resistor, a fifth resistor, a sixth resistor, a seventh resistor, an eighth resistor, a ninth resistor, a tenth resistor, an eleventh resistor, a twelfth resistor, a fourteenth resistor, a fifteenth resistor, a sixteenth resistor, a seventeenth resistor, a nineteenth resistor, a twenty-third resistor, a twenty-fourth resistor, a twenty-fifth resistor, a twenty-ninth resistor, a thirtieth resistor, a thirty-second resistor, a thirty-fourth resistor, a thirty-fifth resistor, a thirty-sixth resistor, a thirty-eighth resistor, a fortieth resistor, a first capacitor, a sixth capacitor, an eighth capacitor, a ninth capacitor, a thirteenth capacitor, a fourteenth capacitor, a sixteenth capacitor, an eighteenth capacitor, a nineteenth capacitor, a twenty-third capacitor, a twenty-fifth capacitor, a twenty-sixth capacitor, a twenty-seventh capacitor, a twenty-eighth capacitor, a twenty-ninth capacitor, a thirtieth capacitor, a thirty-sixth capacitor, a thirty-seventh capacitor, a first MOS tube, a second MOS tube, a fourth MOS tube, a fifth MOS tube, a first inductor and a thermistor; The input end of the anti-backflow circuit serves as the input end of the charging module; The second end of the first resistor, the second end of the second resistor, the first end of the fifth resistor, the first end of the sixth capacitor, the first end of the third resistor and the first end of the eighth capacitor serve as output ends of the charging module to output a charging current; The output end of the anti-backflow circuit is electrically connected to the first end of the fourth resistor and the first end of the sixteenth resistor; The seventh resistor is connected in parallel with the fourth resistor; The second end of the sixteenth resistor is electrically connected to the first end of the twenty-seventh capacitor and the first end of the twenty-eighth capacitor; The second end of the fourth resistor is electrically connected to the first end of the fifteenth resistor, the first end of the sixteenth capacitor, the first end of the fourteenth capacitor, the first end of the twelfth resistor, the thirty-third pin of the charging management chip, the thirty-second pin of the charging management chip, the first end of the first capacitor and the drain of the first MOS tube; The second end of the fifteenth resistor is electrically connected to the second end of the twenty-seventh capacitor, the first end of the twenty-ninth capacitor and the twenty-ninth pin of the charging management chip; The second end of the ninth capacitor is electrically connected to the twenty-third pin of the charging management chip; The second end of the twelfth resistor is electrically connected to the thirty-fourth pin of the charging management chip and the first end of the seventeenth resistor; The second end of the seventeenth resistor is electrically connected to the first end of the nineteenth resistor, the first end of the thirtieth capacitor and the thirty-fifth pin of the charging management chip; The twenty-fourth pin of the charging management chip is electrically connected to the first end of the twenty-sixth capacitor and the first end of the twenty-third resistor; The second end of the twenty-third resistor is electrically connected to the first end of the thirty-fifth resistor, the first end of the thermistor and the eighth pin of the charging management chip; The thirty-sixth pin of the charging management chip is electrically connected to the first end of the thirty-second resistor; The ninth pin of the charging management chip is electrically connected to the first end of the thirty-fourth resistor and the first end of the thirty-eighth resistor; The second end of the thirty-fourth resistor is electrically connected to the first end of the thirty-sixth capacitor; The tenth pin of the charging management chip is electrically connected to the first end of the thirty-sixth resistor and the first end of the fortieth resistor; The second end of the thirty-sixth resistor is electrically connected to the first end of the thirty-seventh capacitor; The twenty-seventh pin of the charging management chip is electrically connected to the gate of the first MOS tube and the first end of the eleventh resistor through the ninth resistor; The source of the first MOS tube is electrically connected to the second end of the eleventh resistor, the first end of the first inductor, the drain of the fifth MOS tube and the twenty-eighth pin of the charging management chip; The gate of the fifth MOS tube is electrically connected to the twenty-fifth pin of the charging management chip through the twenty-fourth resistor; the gate of the fifth MOS tube is electrically connected to the first end of the twenty-ninth resistor; The nineteenth pin of the charging management chip is electrically connected to the first end of the tenth resistor and the gate of the second MOS tube through the eighth resistor; The second end of the tenth resistor is electrically connected to the source of the second MOS tube, the second end of the first inductor, the drain of the fourth MOS tube and the eighteenth pin of the charging management chip; The twenty-first pin of the charging management chip is electrically connected to the first end of the thirtieth resistor and the gate of the fourth MOS tube through the twenty-fifth resistor; The drain of the second MOS tube is electrically connected to the first end of the first resistor, the first end of the second resistor and the first end of the sixth resistor; The second end of the sixth resistor is electrically connected to the first end of the thirteenth capacitor, the first end of the eighteenth capacitor and the fourteenth pin of the charging management chip; The second end of the fifth resistor is electrically connected to the second end of the thirteenth capacitor, the first end of the nineteenth resistor and the thirteenth pin of the charging management chip; The twelfth pin of the charging management chip is electrically connected to the second end of the third resistor, the second end of the eighth capacitor and the first end of the fourteenth resistor; The second end of the fourteenth resistor is electrically connected to the eleventh pin of the charging management chip; The second end of the twenty-eighth capacitor, the second end of the twenty-ninth capacitor, the second end of the sixteenth capacitor, the second end of the fourteenth capacitor, the second end of the nineteenth resistor, the second end of the thirtieth capacitor, the first end of the ninth capacitor, the second end of the twenty-sixth capacitor, the second end of the thirty-fifth resistor, the second end of the thermistor, the second end of the first capacitor, the second end of the thirty-second resistor, the second end of the thirty-sixth capacitor, the second end of the thirty-eighth resistor, the second end of the thirty-seventh capacitor, the second end of the fortieth resistor, the second end of the twenty-ninth resistor, the source of the fifth MOS tube, the second end of the thirtieth resistor, the source of the fourth MOS tube, the second end of the eighteenth capacitor, the second end of the nineteenth capacitor, the second end of the sixth capacitor, the seventeenth pin of the charging management chip U1, the twenty-second pin of the charging management chip U1 and the thirty-seventh pin of the charging management chip U1 are grounded.

5. The drone onboard charger according to claim 4, characterized in that: The anti-backflow circuit is used to prevent the voltage of the rear-stage circuit from backflowing to the front-stage circuit; the anti-backflow circuit includes an N+1 redundant chip, a fourth capacitor, a fifth capacitor, a twentieth capacitor, a twenty-first capacitor, a twenty-second capacitor, a twenty-fourth capacitor and a third MOS tube; The first end of the twentieth capacitor, the first end of the twenty-first capacitor, the ANODE pin of the N+1 redundant chip, the EN pin of the N+1 redundant chip and the drain of the third MOS tube serve as the input end of the anti-backflow circuit; The source of the third MOS tube, the second end of the fourth capacitor, the second end of the fifth capacitor, the first end of the twenty-second capacitor, the first end of the twenty-fourth capacitor and the CATHODE pin of the N+1 redundant chip serve as the output end of the anti-backflow circuit; A second end of the twenty-first capacitor is electrically connected to a VCAP pin of the N+1 redundant chip; The gate of the third MOS tube is electrically connected to the GATE pin of the N+1 redundant chip; The second end of the twentieth capacitor, the GND pin of the N+1 redundant chip, the first end of the fourth capacitor, the first end of the fifth capacitor, the second end of the twenty-second capacitor and the second end of the twenty-fourth capacitor are grounded.

6. The drone onboard charger according to claim 3, characterized in that: Also includes: Power supply processing module; The input end of the power supply processing module is electrically connected to the power supply module; The output end of the power supply processing module is electrically connected to the charging module; The power supply processing module includes an anti-reverse connection protection circuit, a surge suppression circuit, an electromagnetic compatibility circuit and a DC-DC conversion circuit; Wherein, the positive input end of the anti-reverse connection protection circuit is used as the positive input end of the power supply processing module; the negative input end of the anti-reverse connection protection circuit is used as the negative input end of the power supply processing module; The output end of the DC-DC conversion circuit serves as the output end of the power supply processing module; The positive output end of the anti-reverse connection protection circuit is electrically connected to the positive input end of the surge suppression circuit; the negative output end of the anti-reverse connection protection circuit is electrically connected to the negative input end of the surge suppression circuit; the positive output end of the surge suppression circuit is electrically connected to the positive input end of the electromagnetic compatibility circuit; the negative output end of the surge suppression circuit is electrically connected to the negative input end of the electromagnetic compatibility circuit; the positive output end of the electromagnetic compatibility circuit is electrically connected to the positive input end of the DC-DC conversion circuit; the negative output end of the electromagnetic compatibility circuit is electrically connected to the negative input end of the DC-DC conversion circuit; The anti-reverse connection protection circuit is used to protect the drone onboard charger from reverse connection; The surge suppression circuit is used to limit the surge current at the moment of power-on; The electromagnetic compatibility circuit is used to suppress electromagnetic interference; The DC-DC conversion circuit is used to perform voltage conversion on the power supply module, and output power supply to supply power to the charging module.

7. The drone onboard charger according to claim 6, characterized in that: The main control module is also used to receive the operating data of the unmanned aerial vehicle onboard charger and output a control signal according to the operating data; the control signal is used to control the output of the charging current; the operating data includes the output voltage data of the charging module, the temperature data and the output voltage data of the power supply module; the main control module is also used to output a low-voltage power supply.

8. The drone onboard charger according to claim 6, characterized in that: The anti-reverse connection protection circuit comprises: a first fuse, an eighty-first resistor, an eighty-third resistor, an eighty-seventh resistor, a fourth voltage-stabilizing diode and a twelfth MOS tube; The first end of the first fuse serves as a positive input end of the anti-reverse connection protection circuit; The drain of the twelfth MOS tube serves as the negative input terminal of the anti-reverse connection protection circuit; The second end of the first fuse and the first end of the eighty-first resistor serve as the positive output end of the anti-reverse connection protection circuit; The second end of the eighty-seventh resistor, the anode of the fourth voltage stabilizing diode and the source of the twelfth MOS transistor serve as the negative output end of the reverse connection protection circuit; The second end of the eighty-first resistor is electrically connected to the first end of the eighty-third resistor; The second end of the eighty-third resistor is electrically connected to the gate of the twelfth MOS tube, the first end of the eighty-seventh resistor and the cathode of the fourth voltage-stabilizing diode.

9. The drone onboard charger according to claim 6, characterized in that: The surge suppression circuit includes: an eighty-second resistor, an eighty-fourth resistor, an eighty-fifth resistor, an eighty-sixth resistor, an eighty-eighth resistor, a ninety-first resistor, a ninety-third resistor, a ninety-fourth resistor, a seventy-fourth capacitor, a seventy-seventh capacitor, a seventy-eighth capacitor, a third voltage-stabilizing diode, a tenth transistor, and an eleventh MOS transistor; The first end of the eighty-second resistor and the first end of the seventy-fourth capacitor serve as a positive input terminal and a positive output terminal of the surge suppression circuit; The second end of the eighty-eighth resistor, the anode of the third voltage zener diode, the collector of the tenth transistor, the second end of the seventy-seventh capacitor, the second end of the seventy-eighth capacitor, the first end of the ninety-first resistor, the first end of the ninety-fourth resistor and the source of the eleventh MOS transistor serve as the negative input end of the surge suppression circuit; The drain of the eleventh MOS tube, the second end of the ninetieth resistor, the second end of the ninety-third resistor and the second end of the seventy-fourth capacitor serve as the negative output end of the surge suppression circuit; The second end of the eighty-second resistor is electrically connected to the first end of the eighty-fourth resistor; The second end of the eighty-fourth resistor is electrically connected to the first end of the eighty-eighth resistor, the cathode of the third voltage-stabilizing diode, the base of the tenth transistor, and the first end of the eighty-fifth resistor; The emitter of the thirteenth transistor is electrically connected to the first end of the eighty-sixth resistor; The second end of the eighty-sixth resistor is electrically connected to the second end of the eighty-fifth resistor, the first end of the seventy-seventh capacitor, the first end of the seventy-eighth capacitor and the source of the eleventh MOS tube.

10. The drone onboard charger according to claim 6, characterized in that: The electromagnetic compatibility circuit comprises: a sixty-seventh capacitor, a sixty-ninth capacitor, a seventy-first capacitor, a seventy-second capacitor, a seventy-third capacitor, a seventy-fourth capacitor, a seventy-fifth capacitor, a second common-mode inductor and a third common-mode inductor; The first end of the seventy-fourth capacitor, the first end of the seventy-second capacitor and the third end of the second common mode inductor serve as the positive input end of the electromagnetic compatibility circuit; The second end of the seventy-fourth capacitor, the second end of the seventy-second capacitor and the second end of the second common mode inductor serve as a negative input end of the electromagnetic compatibility circuit; The fourth end of the third common mode inductor, the first end of the sixty-seventh capacitor, the first end of the seventy-first capacitor and the first end of the seventy-third capacitor serve as the positive output end of the electromagnetic compatibility circuit; The first end of the third common mode inductor, the second end of the seventy-fifth capacitor, the second end of the seventy-first capacitor and the second end of the seventy-third capacitor serve as a negative output end of the electromagnetic compatibility circuit; The fourth end of the second common mode inductor is electrically connected to the first end of the sixty-ninth capacitor, the first end of the seventieth capacitor and the third end of the third common mode inductor; The first end of the second common mode inductor is electrically connected to the second end of the sixty-ninth capacitor, the second end of the seventieth capacitor and the second end of the third common mode inductor; The second end of the sixty-seventh capacitor and the first end of the seventy-fifth capacitor are connected to the ground line.

11. The drone onboard charger according to claim 7, characterized in that: Also includes: The DC-DC control module is used to respond to the level control signal output by the main control module when the output voltage of the power supply module is over-voltage or abnormal, and output a stop control signal; The DC-DC control module includes: a 100th resistor, a 104th resistor, a 105th resistor, a 106th resistor, an 83rd capacitor, a 14th MOS tube and a first coupler; The first end of the one hundred and fifth resistor is used to receive a level control signal; The fourth end of the first coupler is used to output a stop control signal; The second end of the one hundred and fifth resistor is electrically connected to the first end of the one hundred and sixth resistor; The second end of the one hundred and sixth resistor is electrically connected to the first end of the eighty-third capacitor, the first end of the one hundred and fourth resistor and the gate of the fourteenth MOS tube; The drain of the fourteenth MOS tube is electrically connected to the second end of the first coupler; The first end of the first coupler is connected to the low voltage power supply through the first resistor; The second end of the eighty-third capacitor, the second end of the one hundred and fourth resistor, the source of the fourteenth MOS tube and the third end of the first coupler are grounded.

12. The drone onboard charger according to claim 11, characterized in that: The DC-DC conversion circuit includes: a DC-DC conversion chip, a 107th resistor, a 108th resistor, a 109th resistor, a 110th resistor, a 111th resistor, a 112th resistor, a 99th capacitor, a 4th CY capacitor, a 5th CY capacitor, a 6th CY capacitor, a first capacitor parallel sub-circuit and a second capacitor parallel sub-circuit; The first end of the first capacitor parallel subcircuit and the first pin of the DC-DC conversion chip serve as the positive input end of the DC-DC conversion circuit; The second end of the first capacitor parallel subcircuit, the third pin of the DC-DC conversion chip, the second end of the ninety-ninth capacitor, the first end of the fourth CY capacitor and the first end of the sixth CY capacitor serve as the negative input end of the DC-DC conversion circuit; The eighth pin of the DC-DC conversion chip, the second end of the one hundred and seventh resistor and the first end of the second capacitor parallel sub-circuit serve as the output end of the DC-DC conversion circuit; The first end of the 108th resistor serves as a control end of the DC-DC conversion circuit, and the second pin of the DC-DC conversion chip receives a stop control signal by being electrically connected to the second end of the 108th resistor; the control end of the DC-DC conversion circuit is used to receive the stop control signal, so that the DC-DC conversion circuit stops working in response to the stop control signal; The second pin of the DC-DC conversion chip is electrically connected to the third pin of the DC-DC conversion chip through the ninety-ninth capacitor; The seventh pin of the DC-DC conversion chip is electrically connected to the first end of the 107th resistor and the first end of the 109th resistor; The sixth pin of the DC-DC conversion chip is electrically connected to the second end of the 109th resistor and the first end of the 110th resistor; The second end of the 110th resistor is electrically connected to the first end of the 112th resistor and the fifth pin of the DC-DC conversion chip; The one hundred and eleventh resistor is connected in parallel with the one hundred and tenth resistor; The second end of the fourth CY capacitor and the first end of the fifth CY capacitor are connected to the ground line; The second end of the fifth CY capacitor, the second end of the sixth CY capacitor, the fourth pin of the DC-DC conversion chip, the second end of the 112th resistor and the second end of the second capacitor parallel sub-circuit are grounded.

13. The drone onboard charger according to claim 11, characterized in that: The main control module includes: a main control subcircuit and a communication subcircuit; the main control subcircuit is used to receive the operating data of the unmanned aerial vehicle onboard charger and output a control signal according to the operating data; the communication subcircuit is used to realize the communication between the main control module and the charging module, the host computer, and the battery pack.

14. The drone onboard charger according to claim 13, characterized in that: The communication subcircuit includes: an I2C interface isolation unit, an RS485 interface unit and an RS422 interface unit; the I2C interface isolation unit is used to realize communication between the main control module and the charging module; the RS485 interface unit is used to realize communication between the main control module and the battery pack; the RS422 interface unit is used to realize communication between the main control module and the host computer.

15. The drone onboard charger according to claim 14, characterized in that: It also includes: an output voltage checking module, the input end of the output voltage checking module is electrically connected to the output end of the charging module; the output voltage checking module includes: an output voltage checking chip, a forty-sixth resistor, a forty-ninth resistor, a fifty-fourth resistor, a fifty-seventh resistor, a fifty-ninth resistor, a sixtieth resistor, a sixty-second resistor, a sixty-fourth resistor, a sixty-sixth resistor, a thirty-eighth capacitor, a thirty-ninth capacitor, a forty-third capacitor and a first operational amplifier; The first end of the forty-sixth resistor serves as the input end of the output voltage checking module; The second end of the sixty-second resistor and the first end of the forty-seventh capacitor serve as the output end of the output voltage checking module, and output the output voltage data of the charging module; The second end of the forty-sixth resistor is electrically connected to the first end of the fifty-seventh resistor and the first end of the fifty-ninth resistor through the forty-ninth resistor; The second end of the fifty-ninth resistor is electrically connected to the first end of the forty-third capacitor and the second pin of the output voltage detection chip; The first pin of the output voltage checking chip is electrically connected to the I2C interface isolation unit and the second end of the thirty-ninth capacitor; The sixth pin of the output voltage detection chip is electrically connected to the first end of the sixtieth resistor; The second end of the sixtieth resistor is electrically connected to the inverting input end of the first operational amplifier and the first end of the sixty-sixth resistor; The second end of the sixty-sixth resistor is electrically connected to the output end of the first operational amplifier; The seventh pin of the output voltage detection chip is electrically connected to the first end of the fifty-fourth resistor; The second end of the fifty-fourth resistor is electrically connected to the non-inverting input end of the first operational amplifier and the first end of the sixty-fourth resistor; The positive power supply terminal of the first operational amplifier, the eighth pin of the output voltage detection chip and the first end of the thirty-eighth capacitor are electrically connected to the low voltage power supply; The second end of the fifty-seventh resistor, the first end of the thirty-ninth capacitor, the second end of the forty-third capacitor, the third pin of the output voltage checking chip, the fourth pin of the output voltage checking chip, the fifth pin of the output voltage checking chip, the second end of the sixty-fourth resistor, the negative power supply end of the first operational amplifier, the second end of the forty-seventh capacitor and the second end of the thirty-eighth capacitor are grounded.

Images